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Re: Break lights won'T COME ON 1997 S10 PICKUP
Probably the switch that activates the brakes on the brake pedal. to check it, find the switch under the dash above/on the brake pedal
Remove the connector and short the circuit with the ignition on/running. The brake lights should illuminate. replace if the short works.
I assume you already checked the bulbs...:)
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the break light wire on the lumina runs through the blinker switch or multifunction switch on the colum.. check there as well as at the tail light sockets. on the late 90s gm cars the sockets had a tendancy to rot away... use a test light at the brake light wire in the trunk and have a friend apply the break. if there is power then may have to get new tail lights. or replacement bulbs.
your power starts at the brake light fuse,check with a test light,then proceed to stop light switch on brake pedal under dash,one wire will be hot when when you check it with your test light, the other won't be until you press down the brake pedal then the power flows through to the second wire,if no power to second wire replace switch,if you have power remove tail light bulbs and check for power in side socket.
If the fuses or brake light switch were bad your third brake light would not work same with the multi purpose switch. you either have a wiring problem like some broken wires or the actual light sockets are bad. it is common with gm trucks that the circuit board for the tail lights melts and does not make contact.
Has there been any break work done to it lately? It could be one of the break sensors malfunctioning. or the abs needs to be reset. I have never tried this, but a friend of mine had a problem somewhat simmler to yours, he took the neg. battery cable off for about 5 minutes and hooked it back up and solved his problem. I can't say that will solve yours but its worth a shot and it don't cost anything.